Surname meaning for "Giles"

English and French: from a medieval personal name of which the
original form was Latin Aegidius (from Greek aigidion
‘kid’, ‘young goat’). This was the name of a 7th-century Provençal
hermit, whose cult popularized the name in a variety of more or less
mutilated forms: Gidi and Gidy in southern France,
Gil(l)i in the area of the Alpes-Maritimes, and Gil(l)e
elsewhere. This last form was taken over to England by the Normans,
but by the 12th century it was being confused with the Germanic names
Gisel, a short form of Gilbert, and Gilo, which
is from Gail (as in Gaillard).